55579888 has 80 divisors (see below), whose sum is σ = 134991360. Its totient is φ = 21581568.

The previous prime is 55579861. The next prime is 55579943. The reversal of 55579888 is 88897555.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85581 + ... + 86227.

It is an arithmetic number, because the mean of its divisors is an integer number (1687392).

Almost surely, 2^55579888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55579888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67495680).

55579888 is an abundant number, since it is smaller than the sum of its proper divisors (79411472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55579888 is a wasteful number, since it uses less digits than its factorization.

55579888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734 (or 728 counting only the distinct ones).

The product of its digits is 4032000, while the sum is 55.

The square root of 55579888 is about 7455.1920163065. The cubic root of 55579888 is about 381.6271134449.

The spelling of 55579888 in words is "fifty-five million, five hundred seventy-nine thousand, eight hundred eighty-eight".